Sand-drier.



T. N. SMITH. SAND DRIER. APPLICATION FILED JULY '1, 1911.

Patented Aug. 6, 1912.

COLUMBIA PLANOURAPH 90'. WASHINOTPN. D. C:

TAT

FTQ.

SAND-narnia.

To all whom it may concern:

Be it known that I, THOMAS N. SMITH, a citizen of the United States,residing at Portsmouth, in the county ofNorfolk and State of Virginia,have invented a certain new and useful Sand-Drier, of which thefollowing is a specification.

This invention relates to driers and more particularly to apparatus fordrying sand.

The principal object is to provide a comparatively simple, inexpensive,and eilicientl apparatus of the character stated.

Other objects, as well as the nature, characteristic features and scopeof the invention will be apparent from the following description takenin connection with the accompanying drawing, forming a part hereof,which is a sectional elevational view of a sand drier embodying myinvention.

In apparatus of this character prior to my invention much of the heatgenerated was dissipated or wasted through the stack and radiation wasrelied on to effect the drying. In the present apparatus thisobjectionable feature is obviated and the drying is effected by directdraft as well as by radiation in consequence of which there is little orno wastage of heat. Y

Referring to the drawing, (L, represents a suitable heater; Z),represents a superstructure involving a sand-holder and a heatdeflector; c, represents a stack; and d, represents a cover. The heateror furnace a, is

equipped with a suitable grate 1, an ashy pit 2, and with fuel and ashdoors 3, and 4. Mounted upon the furnace is a flanged ring or annulus 5,that supports the superstructure, including the sand container, heatdeiiector and stack. The sand receptacle embodies a hopper 6, that isheld to place by the flanged ring 5, and a cone-like wire fabric 7,which constitutes a screen for the sand and of such a mesh as to permitthe sand to pass freely. The ring or annulus 5, is perforated as at 8,to permit the falling sand to pass into a chute 9, and a valve 10, isprovided to close said perforations when desired, for example, when thefire is started in order to prevent a back draft.

The heat deflector 11, is interposed between the heater and stack andwith its top or crown 12, tends to throw the heat outwardly against thehopper 6, and the sand screen. Said deflector is preferably a hollowcone-like casting, the part 11, constitut- Specicaton of Letters Patent.

Application filed J'uly 7, 1911.

Patented Aug. 6, 1912. serial No. 627,246.

ing a hopper and having a discharge chute 13, the major portion of whichis in the hot air chamber of the heater. The part 11, is secured againstdisplacement by suitable bridges 14, which are seated on the ring orannulus 5. The top or crown 12, is superposed in spaced relation withrespect to the element 11, by means of ribs or bridges 15, of diii'erentlengths that are notched so as to engage the ledge of deflecto-r element1l. By this construction and arrangement openings 16, are establishedthrough which some of the sand falls into the receptacle-like element11, from whence it is conveyed by the chute 13, to a suitable point ofrecovery. In other words, the element 11, is not only a heat distributeror deflector, but also an auxiliary sand discharge.

Certain of the ribs or bridges 15, are con tinued to near the top of thesand hopper 6, and they constitute supports for the screen 7, and alsoact with their associates as distance-pieces for defining the hot airpassage around the deflector to the stack. They also support the basesection 17, of the stack. This part 17, may bea casting and has a iiange18, that engages the supporting bridges and holds the screen inposition.

The cover d, is cone-shape and is arranged to take into the sand hopper.It has a sleeve 19, which slides on the stack and is sustained andadjusted by means of a cable 20, running over pulleys 2l, and securedfor example by a cleat 22. Access is had to the sand hopper for cleaningpurposes through the medium of a door 23. Vhen the sand hopper is ofespecially large size, the standards 24, are provided as a further meansof support.

In the practice of the invention, the valve 10, is moved to closedposition when the fire is first started so as to avoid a back draft. Assoon as the fire has gained suiiicient headway, the valve is opened topermit the falling dry sand to pass into the chute 9. The space betweenthe heat deflector or elementll, and the screen and hopper is directlyconnected with the hot air chamber 25, and constitutes a dome-like hotair zone through which the sand must travel before reaching the chutesor outlets 9 and 13. Obviously, therefore, the sand is not only dried byradiation of heat from the shell and deflector but also by subjection toa hot blast. Consequently there isvery little, if any, dissipation -orwastage of heat energy.

sion of sparks.

The hopper element 11, of t-he heat deflector may be independent of itschute 13, for 4 facility in assembling the parts. Thisproyision isclearly illustrated in the drawing in which the neck of the chute andt-he throat of the hopper have interlocking comart to which theinvention relates that modiications may be made in details withoutdeparting from the spirit and scope'of the invention. Hence the same isnot limited other than required by the state of the prior E 5 nulus.

art,

I-Iaving described the nature and objects of the invention, I claim 1. Asand drier embodying a heater, a`

sand-holder equipped with a screen and with a cover, a heat distributerintermediate said heater and holder, a valved main sand dischargeoutlet, and an auxiliary sand discharge outlet for the heat distributer.

Q. A sand drier embodying a heater and its complemental stack, a sand-holder e uipped with a screen, a heat deflector or` distributer abovethe heater and cooperating with the sand-holder to form a dome-like hotair passage from the heater to the stack through which sand falls fromthe screen, and suitable means for discharging lthe dry sand.

3. A sand drier embodying a heater andl its complemental stack, aperforated ring or annulus carried by said heater, a sand hopper seatedon said ring and having a screen feed, a cone above the heater andcoperating with the hopper and screen to establish a hot air Zonethrough which the sand falls, a valve operatively arranged with relationto The cover d, when dropped to closed position tends to. retain theheat and also prevent the emisthe annulus, and an adjustable cover forthe hopper.

4. A sand drier embodying a heater and its complemental stack, a coneintermediate the heater and stack, a hopper surrounding the cone andforming therewith a passage to the stack, and means for discharging thesand in a shower through said passage.

5. A sand drier embodying a heater and its complemental stack, aperforated hollow cone intermediate the heater and stack and having asand discharge, a hopper surroundv ing the cone and having a cone-likescreen for discharging sand upon and around the hollow cone, aperforated annulus seated upon and projecting beyond the heater andconstituting the bottom of the hopper, a valve for the saine, and a sandchute operatively disposed with relation to said an- 6. The combinationof a heater and its l stack, a heat deiiector intermediate the same,

a sand-holder and screen surrounding said deiieetor and formingtherewith a passage to the stack, and a cover slidably mounted on thestack in operative relation with the sand-holder.

7. A sand drier embodying a heater, a sand holder in detachable relationtherewith and equipped with a screen and with an adjustable cover, aheat distributer intermediate said heater and holder, a valved main sanddischarge chute in operative relation with the holder, and an auxiliarysand discharge chute for the heat distributer, said chutes traversingthe heater, substantially as described.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

'TI-IOS. N. SMITH.

Witnesses:

CHAs. B. OCONNOR, F. E. FITOHETL.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

